/**
 * @file main.cpp
 * @author xfc (xfc_1939@foxmail.com)
 * @brief 
 * @version 0.1
 * @date 2021-12-21
 * 
 * @copyright Copyright (c) 2021
 * 
 */

#include <iostream>

int main(int argc, char *argv[])
{
    std::cout << "hello world!";
}